// BuildBareFunc builds a function body into an image.
func BuildBareFunc(f string, rc io.ReadCloser) ([]byte, []*lex8.Error) {
fn, es := parse.BareFunc(f, rc)
if es != nil {
return nil, es
}
// resolving pass
log := lex8.NewErrorList()
rfunc := resolveFunc(log, fn)
if es := log.Errs(); es != nil {
return nil, es
}
// building pass
b := newBuilder()
fobj := buildFunc(b, rfunc)
if es := b.Errs(); es != nil {
return nil, es
}
ret, e := link8.LinkBareFunc(fobj)
if e != nil {
return nil, lex8.SingleErr(e)
}
return ret, nil
}
func newBuilder() *builder {
ret := new(builder)
ret.ErrorList = lex8.NewErrorList()
ret.scope = sym8.NewScope()
ret.indices = make(map[string]uint32)
ret.pkgUsed = make(map[string]struct{})
return ret
}
func newBuilder(path string) *builder {
ret := new(builder)
ret.ErrorList = lex8.NewErrorList()
ret.path = path
ret.p = ir.NewPkg(path)
ret.scope = sym8.NewScope() // package scope
ret.continues = newBlockStack()
ret.breaks = newBlockStack()
return ret
}
func resolvePkg(p string, src map[string]*build8.File) (*pkg, []*lex8.Error) {
log := lex8.NewErrorList()
ret := new(pkg)
ret.path = p
asts := make(map[string]*ast.File)
// parse all the files first
var parseErrs []*lex8.Error
for name, f := range src {
astFile, es := parse.File(f.Path, f)
if es != nil {
parseErrs = append(parseErrs, es...)
}
asts[name] = astFile
}
if len(parseErrs) > 0 {
return nil, parseErrs
}
for name, astFile := range asts {
// then resolve the file
file := resolveFile(log, astFile)
ret.files = append(ret.files, file)
// enforce import policy
if len(src) == 1 || name == "import.s" {
if ret.imports != nil {
log.Errorf(file.imports.Kw.Pos,
"double valid import stmt; two import.s?",
)
} else {
ret.imports = file.imports
}
} else if file.imports != nil {
log.Errorf(file.imports.Kw.Pos,
"invalid import outside import.s in a multi-file package",
)
}
}
if es := log.Errs(); es != nil {
return nil, es
}
return ret, nil
}
func (lang) Compile(pinfo *build8.PkgInfo) (
compiled build8.Linkable, es []*lex8.Error,
) {
// resolve pass, will also parse the files
pkg, es := resolvePkg(pinfo.Path, pinfo.Src)
if es != nil {
return nil, es
}
// import
errs := lex8.NewErrorList()
if pkg.imports != nil {
for _, stmt := range pkg.imports.stmts {
imp := pinfo.Import[stmt.as]
if imp == nil || imp.Compiled == nil {
errs.Errorf(stmt.Path.Pos, "import missing")
continue
}
stmt.linkable = imp.Compiled
if stmt.linkable == nil {
panic("import missing")
}
stmt.lib = stmt.linkable.Lib()
}
if es := errs.Errs(); es != nil {
return nil, es
}
}
// library building
b := newBuilder()
lib := buildLib(b, pkg)
if es := b.Errs(); es != nil {
return nil, es
}
return lib, nil
}
func listImport(
f string, rc io.ReadCloser, imp build8.Importer,
) []*lex8.Error {
astFile, es := parse.File(f, rc)
if es != nil {
return es
}
if astFile.Imports == nil {
return nil
}
log := lex8.NewErrorList()
impDecl := resolveImportDecl(log, astFile.Imports)
if es := log.Errs(); es != nil {
return es
}
for as, stmt := range impDecl.stmts {
imp.Import(as, stmt.path, stmt.Path.Pos)
}
return nil
}
func (b *Builder) build(p string) (*pkg, []*lex8.Error) {
ret := b.pkgs[p]
if ret == nil {
panic("build without prepare")
}
// already compiled
if ret.compiled != nil {
return ret, nil
}
if ret.buildStarted {
e := fmt.Errorf("package %q circular depends itself", p)
return ret, lex8.SingleErr(e)
}
ret.buildStarted = true
lang := ret.lang
for _, imp := range ret.imports {
built, es := b.build(imp.Path)
if es != nil {
return nil, es
}
imp.Compiled = built.compiled
}
// ready to build this one
if b.Verbose {
fmt.Println(p)
}
// compile now
pinfo := &PkgInfo{
Path: p,
Src: ret.srcMap(),
Import: ret.imports,
CreateLog: func(name string) io.WriteCloser {
return b.home.CreateLog(p, name)
},
}
compiled, es := lang.Compile(pinfo)
if es != nil {
return nil, es
}
ret.compiled = compiled
lib := ret.compiled.Lib() // the linkable lib
// a package with main entrance, build the bin
main := ret.compiled.Main()
if main != "" && lib.HasFunc(main) {
log := lex8.NewErrorList()
fout := b.home.CreateBin(p)
lex8.LogError(log, link8.LinkMain(lib, fout, main))
lex8.LogError(log, fout.Close())
if es := log.Errs(); es != nil {
return nil, es
}
}
return ret, nil
}